What is 7v=2v-20, I do not understand how to work to get it right.

7v=2v-20

okay, so first what you need to do is combine like terms (in this case 7v and 2v). to do this, you would have to subtract 2v from each side and you get ...

5v=-20

then you would have to divide by 5 on each side to isolate the variable v.

-20 divided by 5 is - 4 so your answer is ...

v=-4